A couple of crime dramas begin new seasons tonight on TNT: “Major Crimes” and “Murder in the First.”

“Major Crimes” begins Season 3 at 9 p.m. as a father and his two children are missing. Mary McDonnell stars as Los Angeles Police Capt. Sharon Raydor. Investigators include G.W. Bailey as Lt. Provenza and Tony Denison as Lt. Andy Flynn.

“Murder in the First” marks its series premiere at 10 p.m., and the pilot episode zeroes in on two San Francisco detectives who investigate the murder of a junkie. The drama stars Taye Diggs and Kathleen Robertson.